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An Exact Dual Decomposition Algorithm for Shallow Semantic Parsing with Constraints ...
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Frame-Semantic Parsing
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In: MIT Press (2012)
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Abstract:
Frame semantics is a linguistic theory that has been instantiated for English in the FrameNet lexicon. We solve the problem of frame-semantic parsing using a two-stage statistical model that takes lexical targets (i.e., content words and phrases) in their sentential contexts and predicts frame-semantic structures. Given a target in context, the first stage disambiguates it to a semantic frame. This model uses latent variables and semi-supervised learning to improve frame disambiguation for targets unseen at training time. The second stage finds the target's locally expressed semantic arguments. At inference time, a fast exact dual decomposition algorithm collectively predicts all the arguments of a frame at once in order to respect declaratively stated linguistic constraints, resulting in qualitatively better structures than naïve local predictors. Both components are feature-based and discriminatively trained on a small set of annotated frame-semantic parses. On the SemEval 2007 benchmark data set, the approach, along with a heuristic identifier of frame-evoking targets, outperforms the prior state of the art by significant margins. Additionally, we present experiments on the much larger FrameNet 1.5 data set. We have released our frame-semantic parser as open-source software. ; United States. Defense Advanced Research Projects Agency (DARPA grant NBCH-1080004) ; National Science Foundation (U.S.) (NSF grant IIS-0836431) ; National Science Foundation (U.S.) (NSF grant IIS-0915187) ; Qatar National Research Fund (NPRP 08-485-1-083)
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URL: http://hdl.handle.net/1721.1/88418
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43 |
Learning Structured Classifiers with Dual Coordinate Ascent
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In: DTIC (2010)
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44 |
Imprensa, minorias e análise do discurso: um espaço de construção da democracia
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In: Cadernos de Linguagem e Sociedade; v. 8: v. 8 (2006/2007); 26 ; 2179-4790 ; 0104-9712 ; 10.26512/les.v8i0 (2010)
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EAGLETON, T. Ideologia: uma introdução. Trad. S. Vieira e L. C. Borges. São Paulo: Editora da Universidade Estadual Paulista/Editora Boitempo, 1997, 204 págs.
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In: Cadernos de Linguagem e Sociedade; v. 5 (2001); 169 ; 2179-4790 ; 0104-9712 ; 10.26512/les.v5i0 (2010)
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LINGUAGEM COMO PRÁTICA SOCIAL
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In: Cadernos de Linguagem e Sociedade; v. 6 (2003); 31-43 ; 2179-4790 ; 0104-9712 ; 10.26512/les.v6i0 (2010)
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Intertextualidade e identidade social
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In: Cadernos de Linguagem e Sociedade; v. 2 n. 1 (1996); 62 ; 2179-4790 ; 0104-9712 ; 10.26512/les.v2i1 (2010)
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BOLÍVAR, A. e KOHN, C. (orgs.) El discurso político venezolano: un estudio multidisciplinario. Caracas: Universidade Central da Venezuela/Fondo Editorial Tropykos, 1999, 210 págs.
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In: Cadernos de Linguagem e Sociedade; v. 5 (2001); 151 ; 2179-4790 ; 0104-9712 ; 10.26512/les.v5i0 (2010)
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51 |
Grupos excluídos no discurso da mídia: uma análise de discurso crítica ; Minorities in the media discourse: a critical discourse analysis
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O ensino do conceito de tempo: contribuições históricas e epistemológicas. ; Teaching the concept of time: historical and epistemological contributions.
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